---
name: "dcf77"
section: "1"
platform: "linux"
package: "osmocom-analog"
version: "0.0~git20250208.4ebf64f-1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/dcf77"
---

# dcf77(1)

http://osmocom-analog.eversberg.eu/docs/

## NAME

**dcf77** - http://osmocom-analog.eversberg.eu/docs/

## SYNOPSIS

**dcf77** **\[***-a hw:0,0*\] \[*\<options\>*\]

**-h** **--help**

-

  This help

**--config** \[~/\]\<path to config file\>

-

  Give a config file to use. If it starts with '~/', path is at home dir. Each line in config file is one option, '-' or '--' must not be given!

**-v** **--verbose** \<level\> \| \<level\>,\<category\>\[,\<category\>\[,...\]\] \| list

-

  Use 'list' to get a list of all levels and categories. Verbose level: digit of debug level (default = '3') Verbose level+category: level digit followed by one or more categories -\> If no category is specified, all categories are selected

**-v** **--verbose** date

-

  Show date with debug output

**-a** **--audio-device** hw:\<card\>,\<device\>

-

  Sound card and device number (default = '')

**-s** **--samplerate** \<rate\>

-

  Sample rate of sound device (default = '192000')

**-b** **--buffer** \<ms\>

-

  How many milliseconds are processed in advance (default = '50') A buffer below 10 ms requires low interval like 0.1 ms.

**-T** **--tx**

-

  Transmit time signal (default)

**-R** **--rx**

-

  Receive time signal

**-F** **--fake**

-

  Use given time stamp: \<year\> \<month\> \<day\> \<hour\> \<min\> \<sec\>. All values have to be numerical. The year must have 4 digits.

**--feierabend**

**--end-of-working-day**

-

  Use fake time stamp that equals 5 O'Clock PM.

**--geburtstag**

**--birthday**

-

  Use fake time stamp that equals birth of the author.

**-W** **--weather** \<weather\> \<extreme\> \<rain\> \<wind dir\> \<wind bft\> \<temperature\>

-

  Send these weather info for all regions / all days. See **-L** for infos on values. weather = 1..15 for common day and night weather. weather = 1..15,1..15 for specific day and night weather. extreme = 0..15 for extreme weather conditions. rain = 0..100 for rain/show probability. (closest is used) wind dir = N \| NE \| E \| SE \| S \| SW \| W \| NW \| 0 for wind direction. wind bft = \<bft\> for wind speed in bft. (closest is used) temerature = \<celsius\> for common min and max temperature. temerature = \<celsius\>,\<celsius\> for specific min and max temperature.

**--beach-party**

-

  Beach weather, equivalent to **-W** 1 0 0 0 2 35,20

**--santa-claus**

**--muenster-2005**

-

  Deep snow, equivalent to **-W** 7 1 100 E 3 1,-1

**-A** **--at-region** \<region\> \<advance minutes\>

-

  Alter time, so that the weather of the given region is transmitted. To allow the receiver to sync, give time to advance in minutes.

**-L** **--list**

-

  List all regions / weather values.

**-C** **--city** \<name fragment\>

-

  Search for city (case insensitive) and display its region code.

**-D** **--double-amplitude**

-

  Transmit with double amplitude by using differential stereo output.

**--test-tone**

-

  Transmit a test tone (10% level, 1000 Hz) with the carrier.

**-r** **--realtime** \<prio\>

-

  Set prio: 0 to disable, 99 for maximum (default = 0)

**--fast-math**

-

  Use fast math approximation for slow CPU / ARM based systems.

Press 'w' key to toggle display of RX wave form. Press 'm' key to toggle display of measurement values.